Revert "Revert "Use act() in ReactFabric tests""

[sujatakhadka111]

Reverts #21840

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[sizebot]

Comparing: 84639ab...2b7cbb9

Critical size changes

Includes critical production bundles, as well as any change greater than 2%:

Name	+/-	Base	Current	+/- gzip	Base gzip	Current gzip
oss-stable/react-dom/cjs/react-dom.production.min.js	=	127.20 kB	127.20 kB	=	40.76 kB	40.76 kB
oss-experimental/react-dom/cjs/react-dom.production.min.js	=	130.01 kB	130.01 kB	=	41.67 kB	41.67 kB
facebook-www/ReactDOM-prod.classic.js	=	404.75 kB	404.75 kB	=	74.83 kB	74.83 kB
facebook-www/ReactDOM-prod.modern.js	=	393.15 kB	393.15 kB	=	73.07 kB	73.08 kB
facebook-www/ReactDOMForked-prod.classic.js	=	404.75 kB	404.75 kB	=	74.83 kB	74.83 kB

Significant size changes

Includes any change greater than 0.2%:

(No significant changes)

Generated by 🚫 dangerJS against 2b7cbb9

[bvaughn]

@sujatakhadka111 What's the plan with this PR? Some explanation is generally required for any PR, include reverts.

cc @yungsters

[yungsters]

@acdlite already re-landed these changes using jest-react.

[bvaughn]

So this PR can be closed?

[yungsters]

I think so…

[bvaughn]

Okay. Closing for now then unless I hear otherwise from @sujatakhadka111.